Foundry chill plate



Dec 16, 1958 w. L. JENKINS FOUNDRY CHILL PLATE Filed June 18, 1952 FIG.B

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S m N m E J M R m A United States Patent 6 FOUNDRY CHILL PLATE WendellL. Jenkins, Canton, Ohio, assignor to The Vf.(I).l.fiJenkins :Company,Canton, Ohio, a corporation 0 Application June 18, 1952, Serial No.294,203

3 Claims. (Cl. 22-183) speed up the cooling of the molten metal atcertain locations where the cooling rate would otherwise be slow due tothe configuration of the mold cavity, or where a relatively rapidcooling is required to produce desired conditions, thus preventing theoccurrence of cracks and other defects in the casting at thoselocations. Such .chill plates are made in various shapes includingradius chills having a transverse curvature which may be concave orconvex for fitting complementary curved surfaces in the mold cavity.

Conventional chill plates are provided with holes at spaced points forreceiving nails which extend into the sand and serve to anchor the chillplate in place as the metal is poured, and this method of anchoringchill plates is shown in Patent No. 2,231,703, issued February 11, 1941,to W. T. Clark. Additional nails are usually inserted at each end of thechill to prevent it from getting out of position or out of alignment.

The use of nails for anchoring chill plates not only requires punchingholes in the chill plate, but also requires the additional operation ofinserting the nails through the holes, and usually additional nails atthe ends of the plate to keep it in position, which themolder is likelyto forget to do, and as a consequence the chill plate is not properlyanchored when the molten metal is poured and the casting may be ruined.Moreover, when the nails are inserted, the molder frequently appliesexcessive or unequal pressure at different points, causing the chill tobecome cocked out of position or alignment in the sand, resulting inrough projections or pockets in the surface of the finished casting,which requires additional filing or grinding operations to make thecasting acceptable. Excessive or unequal pressures are particularly aptto be applied to chill plates which are rammed into the cope side of themold or core and the only means holding them in place are the nailsprojecting upwardly into the sand.

It is very important that chill plates be provided with a series of ventholes to provide for elimination of gases and steam at the surfaces ofthe mold cavity where the chills are located, because otherwiseroughness, pin holes" and other defects occur at those points.Accordingly, conventional .chill plates are provided with vent holes inaddition to the nail holes, thus adding to the cost of producing thechill plates.

It is an object of the present invention to provide a novel chill platehaving integral anchoring projections which cannot become detached andoverlooked. and which are bent angularly from the plate to provide ventopenings therein, thus eliminating the necessity of punch- "ice ing.nail holes in the plate and the operation of inserting nails to anchorthe plate in the mold.

Another object is to provide a novel chill plate which is quickly andeasily set into place in the sand, and which is automatically locked inposition when set.

A further object is to provide a novel chill plate which overcomes thedisadvantages of prior constructions, and is simple and inexpensive tomanufacture, and easily positioned accurately in the mold.

, These and other objects are accomplished by the improved constructioncomprising the invention, preferred embodiments of which are shown anddescribed herein as exemplifying the best known mode of carrying out theinvention, and the scope of the invention being defined in the appendedclaims.

Referring to the drawings:

Fig. 1 is a plan view of one embodiment of the novel chill plate;

Fig. 2 is an end elevation thereof;

Fig. 3 is a plan view of another embodiment;

Fig. 4 is an end elevation thereof;

Fig, 5 is a plan view of another modification;

Fig. 6 is an elevation thereof; 1

Fig. 7 is a longitudinal section on line 77, Fig. 1;

Fig. 8 is a longitudinal section on line 88, Fig. 2;

Fig. '9 is a longitudinal section on line 9-9, Fig. 5;

Fig. 10 is a fragmentary sectional view through a sand mold showing themanner of use of the novel chill plate, the embodiments of Figs. 3 and 5being illustrated; and

Fig. 11 is afragmentary sectional view, as on line 1111, Fig. 10.

The embodiments of the invention shown in the drawings areconventionally known as radius chills and are commonly used in molds orcores where curved surfaces or fillets are formed in the casting.However, these chill plates may be used at any desired location in amold cavity where it is desired to speed up the cooling andsolidification of the metal and to prevent the formation of defects inthe casting. Moreover, the particular transverse contour of the chillplates may be varied to suit requirements and may be flat.

The .chill plate 12 shown in Figs. 1, 2 and 7 has a uniform transversecurvature throughout its length, and longitudinally spaced prongs orprojections 13 are struck or punched out of the central portion of thestrip. The prongs 13 are preferably slightly tapered and their ends maybe somewhat pointed, and in this form they extend at right angles to theconcaveside' of the strip forming slightly tapered vent openings 14through the strip. When the pointed ends of the prongs 13 are forcedinto the sand the convex side 15 is the front side or surface which isexposed to the molten metal in the mold.

The strip 12a which is shown in Figs. 3, 4 and 8 is transversely curvedsimilarly to the strip 12, and has longitudinally spaced tapered prongs13a punched out of its central portion and extending rearwardly from theconcave side of the strip forming tapered vent openings 14a. In thisembodiment, however, the prongs or projections 13a are inclined to thelongitudinal central portion of the strip so that they extend rearwardlytherefrom at acute angles rather than at right angles as in the strip12. As shown in Fig. 8, the prongs 13a are preferably bent out from thestrip in opposite directions at angles of about 60, although theseangles may be varied as desired.

An important feature is to have the prongs bent at less than rightangles to the strip so that when the prongs are pushed into the sand ofthe mold or core they lock or anchor into the sand because of theirinclination to the strip and because they are inclined in oppositedirections. The oppositely inclined prongs are particularly advantageouswhen used on the cope side of the mold or core because they can be setin position with moderate pressure to position the outer surface of thechill properly relative to the mold surface, and yet are firmly lockedinto the sand. p

The strip 12b shown in Figs. 5, 6 and 9 is transversely curved similarlyto the strip 12a, but the longitudinally spaced tapered prongs 1312,which are punched out of the strip to form tapered vent openings 14b,extend rear- Wardly from the convex side of the strip at acute anglesthereto. Thus the concave side of the strip becomes the front side orsurface which is exposed in the mold when the prongs are forced into thesand. As shown in Fig. 9,

the prongs 13b are oppositely inclined at acute angles of about 60 withthe mold so as to lock into the sand firmly and securely. Forconvenience, all of the chill plates 12, 12a and 12b are shown asrelatively short, with a pair of prongs projecting angularly therefrom,but it will be understood that within the scope of the invention thelength may be varied to suit requirements and a series of prongs punchedout of the strip at regular intervals. It may be desirable for themanufacturer to furnish a wide variety of sizes and shapes, all havingthe novel integral prongs forming a series of vent openings in the chillplate.

In Figs. 10 and 11, chill plates 12a and 12b are shown positionedrespectively in convexly and concavely curved corners of a sand mold 15,a plurality of the plates being positioned end to and along the corners,to promote relatively rapid cooling of the casting in those cornerportions. As shown in Fig. 11, when the prongs 13a are rammed into thesand, or the sand is rammed around the prongs because of theirinclination in opposite directions they are firmly locked or anchored inthe sand so as to prevent shifting of the chill plate in any direction,and there is no necessity of inserting additional anchors at the ends ofthe plates, as is the case with nails. If the plates are used on thecope side of a mold or core so that they are inverted, this lockingfeature is still more important because it prevents the chills fromdropping out of position, and enables ramming them into position withless force. As a result there is less likelihood of the chills beingcocked out of position or alignment when the molten metal is poured,which would cause projections or pockets in the surface of the finishedcasting and require additional grinding or filing.

In all forms of the invention, the angularly bent prongs are punched outof the metal of the strip and provide vent openings of substantial areaat regular intervals along the length of the strip, permitting ampleopportunity for the escape of steam and gases generated during thecasting operation, without requiring any additional vent holes to bepunched in the strip. The prongs are easily punched and bent out fromthe metal in a simple and inexpensive operation, and being integral withthe strip cannot become lost or forgotten by the molder as in the caseof nails; and moreover the additional operation .4 of inserting thenails in holes in the strip or at the ends of the strip is eliminated.

The length and contour of the novel chill plates can be variedsubstantially to complement various mold contours, without affecting themanner of forming or the construction of the prongs extending angularlyfrom the plates. Moreover, the angles between the prongs and the chillplate can be varied within the scope of the invention defined in theappended claims.

What is claimed is:

1. In combination with a sand mold having a contoured surface forming atleast part of a mold cavity for casting molten metal, a chill platecomprising an elongated strip of metal formed transversely to fit aportion of said contoured surface, said strip having a pair oflongitudinally spaced prongs bent out of the strip along its medianportion extending into the sand and forming vent openings through themedian portion of the strip, and said prongs being inclinedlongitudinally in opposite directions at an acute angle with the stripto lock said chill plate in the compacted sand of the mold.

2. In combination with a sand mold having a contoured surface forming atleast part of a mold cavity for casting molten metal, a chill platecomprising an elongated strip of metal curved transversely to fit aportion of said contoured surface, said strip having a pair oflongitudinally spaced prongs bent out at the strip along its medianportion extending from the concave side into the sand and forming ventopenings through the median portion of the strip, and said prongs beinginclined longitudinally in opposite directions at an acute angle withthe strip to lock said chill plate in the compacted sand of the mold.

3. In combination with a sand mold having a contoured surface forming atleast part of a mold cavity for casting molten metal, a chill platecomprising an elongated strip of metal curved transversely to fit aportion of said contoured surface, said strip having a pair oflongitudinally spaced prongs bent out of the strip along its medianportion extending from the convex side into the sand and forming ventopenings through the median portion of the strip, and said prongs beinginclined longitudinally in opposite directions at an acute angle withthe strip to lock said chill plate in the compacted sand of the mold.

References Cited in the file of this patent UNITED STATES PATENTS766,257 Ianes Aug. 2, 1904 935,978 Haskins Oct. 5, 1909 1,540,551 EvansJune 2, 1925 1,877,049 Raible Sept. 13, 1932 2,141,946 Batcheller et alDec. 27, 1938 2,214,939 Stirn Sept. 17, 1940 2,231,703 Clark Feb. 11,1941

